7
PH Gas Logs
Monessen • PH18/24 Installation/Owner's Manual • 65D2035 • Rev G • 03/2020
W
ARNING
This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built
fireplace, vent free appliance, or in listed ventless firebox enclosure. It has been design certified
for these installations.
Exception:
DO NOT install this appliance in a factory-built fireplace that includes instructions
stating it has not been tested or should not be used with unvented gas logs.
FIREPLACE and HEARTH DIMENSIONS
Use manufacturer’s installation and clearance require-
ments as defined in their manual.
The PH Series unvented room heater is approved for instal-
lation into the following unvented fireplaces:
GCUF(32,36,42) and VFR(32,36,42) Series Fireboxes
The PH Series unvented room heater may also be installed
into a Ventless Firebox Enclosure for Gas Fired Decorative
Type Unvented Room Heaters per ANSI Z21.91b.2004,
as long as firebox hearth dimensions meet the minimum
hearth dimensions shown below.
C
A
D
B
FP2530
hearth dims
MODEL
A
B
C
D
PH18
25"
(635 mm)
13"
(330 mm)
17
1
⁄
2
"
(445 mm)
17"
(432 mm)
PH24
29"
(737 mm)
13"
(330 mm)
19
1
⁄
2
"
(495 mm)
17"
(432 mm)
PH30
35"
(889 mm)
13"
(330 mm)
25
1
⁄
2
"
(648 mm)
17"
(432 mm)
Figure 1 -
Hearth Minimum Dimensions
FP2530
Barriers such as the bottom of a glass door
frame placed in front of a gas log set can
change the air flow characteristics of the
fireplace which in turn can cause the unit
to overheat and malfunction.
W
ARNING
IMPORTANT INFORMATION FOR THE IN-
STALLATION OF THIS GAS LOG SET
The following are guidelines for placing a gas log set in
a fireplace that has a restrictive barrier along the bottom
front opening of the fireplace. Some examples of barri
-
ers are glass/screen door frames and sunken/recessed
fireplaces.
Height of
Minimum Depth of
Restriction (x)
Fireplace/Firebox
No Restriction
13"
0" to 1
1
⁄
2
"
16"
Greater than 1
1
⁄
2
" to 3"
16"
Greater than 3"
*
*Any barrier greater than 3" placed in front of the gas log
set is not recommended by the manufacturer.
NOTE:
Non combustible material such as refractory brick
may be used to line the floor of the fireplace in order to raise
the height of the gas log set in relation to a restrictive barrier.
If the unit is raised, the minimum height dimension listed in
the homeowner’s manual must not be exceeded.
NOTE:
If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
the ambient temperature inside the fireplace. Placement
of the receiver outside of the fireplace will extend the
battery life.
Figure 2 -
Reference Drawing of a Natural
Flame Log Set in an Enclosure
X
FP2794
logs in enclosure
Depth of
Fireplace/
Firebox
(Refer to
Table)
The log set should
be placed against or
as near as possible
to the rear wall of the
fireplace
Glass door
frames with ad-
justable louvers
should have
the louvers
fully open while
the unit is in
operation
Height of restrictive barrier
caused by glass door
frames, recessed fireplac
-
es, etc. from the base or
bottom surface of the unit.
(Refer to Table).
FP2794
Figure 1
